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v7.1.6: ticdc: add description for cdc behaviour change (#17530) #17672

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Nov 21, 2024
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v7.1.6: ticdc: add description for cdc behaviour change (#17530) #17672

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9fb3ce7
This is an automated cherry-pick of #17530
lidezhu May 30, 2024
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Discard changes to releases/release-8.1.0.md
qiancai May 30, 2024
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resolve conflicts
qiancai May 30, 2024
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Update ticdc/ticdc-behavior-change.md
qiancai May 30, 2024
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Update ticdc/ticdc-behavior-change.md
qiancai Jun 4, 2024
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thresholdTs -> thresholdTS
qiancai Jun 5, 2024
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qiancai Jun 13, 2024
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Discard changes to ticdc/ticdc-behavior-change.md
qiancai Nov 18, 2024
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Merge remote-tracking branch 'upstream/release-7.1' into pr/17672
qiancai Nov 18, 2024
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Merge branch 'cherry-pick-17530-to-release-7.1' of https://github.com…
qiancai Nov 18, 2024
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Discard changes to ticdc/ticdc-split-update-behavior.md
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qiancai Nov 18, 2024
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4 changes: 2 additions & 2 deletions ticdc/ticdc-split-update-behavior.md
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Expand Up @@ -7,7 +7,7 @@ summary: Introduce the behavior changes about whether TiCDC splits `UPDATE` even

## Split `UPDATE` events for MySQL sinks

Starting from v6.5.10, when using the MySQL sink, any TiCDC node that receives a request for replicating a table will fetch the current timestamp `thresholdTS` from PD before starting the replication to the downstream. Based on the value of this timestamp, TiCDC decides whether to split `UPDATE` events:
Starting from v6.5.10 and v7.1.6, when using the MySQL sink, any TiCDC node that receives a request for replicating a table will fetch the current timestamp `thresholdTS` from PD before starting the replication to the downstream. Based on the value of this timestamp, TiCDC decides whether to split `UPDATE` events:

- For transactions containing one or multiple `UPDATE` changes, if the transaction `commitTS` is less than `thresholdTS`, TiCDC splits the `UPDATE` event into a `DELETE` event and an `INSERT` event before writing them to the Sorter module.
- For `UPDATE` events with the transaction `commitTS` greater than or equal to `thresholdTS`, TiCDC does not split them. For more information, see GitHub issue [#10918](https://github.com/pingcap/tiflow/issues/10918).
Expand Down Expand Up @@ -138,4 +138,4 @@ Starting from v6.5.10 and v7.1.6, when using a non-MySQL sink, TiCDC supports co
| v7.1.1 | Canal/Open | ✗ | ✓ | |
| v7.1.1 | CSV/Avro | ✗ | ✗ | Split but does not sort. See [#9086](https://github.com/pingcap/tiflow/issues/9658) |
| v7.1.2 ~ v7.1.5 | ALL | ✓ | ✗ | |
| \>= v7.1.6 (not released yet) | ALL | ✓ (Default value: `output-raw-change-event = false`) | ✓ (Optional: `output-raw-change-event = true`) | |
| \>= v7.1.6 | ALL | ✓ (Default value: `output-raw-change-event = false`) | ✓ (Optional: `output-raw-change-event = true`) | |
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